Reintroduce type case normlisation to Punkt (accidentally removed in r7362; see http://code.google.com/p/nltk/issues/detail?id=313).
Reintroduce type case normlisation to Punkt (accidentally removed in r7362; see http://code.google.com/p/nltk/issues/detail?id=313).

svn/trunk@8352

nltk/nltk,nltk/nltk,nltk/nltk